Tbh, some of the time I thought I was imagining it when my son was still little. I knew really that he was different to the other children, even when he was a baby, but until I found out a bit more about AS, I really didn't know why. And there was always a reason that you could attribute certain behaviours to, ifkwim? Then when I did understand AS, everything fell into place, and I was sure he had it for at least 18 months before he was finally diagnosed.
Don't feel bad that you haven't been to the GP before, you went earlier than I did, and my ds is fine. I learned to respond to him as an individual anyway, and it was the things I learned myself that made the difference to how I reacted to him, not the stuff the doctors had to say. When I realised that he had AS, I felt horribly guilty for two times that I had told him off, and forced him to look at me. I though he was just being rude, and didn't realise that eye contact is something that AS children genuinely find hard. He had acted like pure evil towards his younger brother both times, and obviously didn't understand the way he was making his brother feel. But I used to wonder what I'd done wrong and how he could possibly be so horrible. Btw, I know I shouldn't say 'evil' about my son, but that is honestly how I used to feel. He is my child, I love him to the ends of the earth, and I would slap anyone else that dared say the same! I'm just trying to be honest!
He is absolutely fine now, it has got easier as he's got older, (he's just turned 10)although there will always be aspergers traits that we have to deal with. Like the behaviour has got alot better, he fully understands what is acceptable and what is not, and he knows the consequenses if he does things he shouldn't. I feel sad though that he only very occasionally feels truly proud of himself, he doesn't often feel that nice feeling you get when you do something nice for someone else, things like that. But it doesn't bother him, he knows no different. He has always been incredibly bright, pretty much taught himself to read when he was four, can do maths that my brain can't comprehend, but it has started to show now that he struggles with English. Not spelling and grammar, those are things he finds easy to learn, but when he has to write a story he just can't do it. He has no imagination at all, and during comprehension questions where he has to answer things like 'what do you think about.....? ' ect, he finds incredibly difficult. That has come as a bit of a shock really, because I never had to worry about anything academically before.
I'm waffling a bit, but really, it's all fine and cope with able! It's just about finding different ways of dealing with things.
Don't worry too much about the teachers reaction, she may have pre conceived ideas about these things and might learn something herself from your son. You know him best.